Indian drug maker Ranbaxy Laboratories is Halting Ingredient Production at Two of its Facilities.

NEW DELHI—Indian drug maker Ranbaxy Laboratories Ltd. said it is temporarily halting production "as a precautionary measure" at two factories in India that manufacture critical ingredients for generic medicines.

U.S. regulators last month barred the import of drugs from one of the plants, in Toansa, after investigators said workers there were fudging test results. Drug imports to the U.S. from the other plant have been...